--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/bitRange/CompoundBitRange.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.sun.max.asm.gen.risc.bitRange;
+
+import java.util.*;
+
+/**
+ * A range of bits that is composed of several disjoint subranges.
+ */
+
+public class CompoundBitRange extends BitRange {
+
+    public CompoundBitRange() {
+        super();
+    }
+
+    private List<ContiguousBitRange> contiguousBitRanges = new ArrayList<ContiguousBitRange>();
+
+    public List<ContiguousBitRange> contiguousBitRanges() {
+        return contiguousBitRanges;
+    }
+
+    public void add(ContiguousBitRange contiguousBitRange) {
+        contiguousBitRanges.add(contiguousBitRange);
+    }
+
+    @Override
+    public CompoundBitRange move(boolean left, int bits) {
+        final CompoundBitRange movedRange = new CompoundBitRange();
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            movedRange.add((ContiguousBitRange) contiguousBitRange.move(left, bits));
+        }
+        return movedRange;
+    }
+
+    @Override
+    public int width() {
+        int result = 0;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            result += contiguousBitRange.width();
+        }
+        return result;
+    }
+
+    @Override
+    public int encodedWidth() {
+        int result = 0;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            result += contiguousBitRange.encodedWidth();
+        }
+        return result;
+    }
+
+    @Override
+    public int instructionMask() {
+        int mask = 0;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            mask |= contiguousBitRange.instructionMask();
+        }
+        return mask;
+    }
+
+    @Override
+    public int numberOfLessSignificantBits() {
+        int result = 32;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            final int n = contiguousBitRange.numberOfLessSignificantBits();
+            if (n < result) {
+                result = n;
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof CompoundBitRange)) {
+            return false;
+        }
+        final CompoundBitRange compoundBitRange = (CompoundBitRange) other;
+        return contiguousBitRanges.equals(compoundBitRange.contiguousBitRanges);
+    }
+
+    @Override
+    public int hashCode() {
+        return contiguousBitRanges.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        String result = null;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            if (result != null) {
+                result += "," + contiguousBitRange;
+            } else {
+                result = contiguousBitRange.toString();
+            }
+        }
+        return result;
+    }
+
+    /* Extracting */
+
+    @Override
+    public int extractSignedInt(int instruction) {
+        final Iterator<ContiguousBitRange> iterator = contiguousBitRanges.iterator();
+        final ContiguousBitRange firstBitRange = iterator.next();
+        int signedInt = firstBitRange.extractSignedInt(instruction);
+        while (iterator.hasNext()) {
+            final ContiguousBitRange contiguousBitRange = iterator.next();
+            signedInt <<= contiguousBitRange.width();
+            signedInt |= contiguousBitRange.extractUnsignedInt(instruction);
+        }
+        return signedInt;
+    }
+
+    @Override
+    public int extractUnsignedInt(int instruction) {
+        int unsignedInt = 0;
+        for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
+            unsignedInt <<= contiguousBitRange.width();
+            unsignedInt |= contiguousBitRange.extractUnsignedInt(instruction);
+        }
+        return unsignedInt;
+    }
+
+    /* Inserting */
+
+    @Override
+    public int assembleUncheckedSignedInt(int signedInt) throws IndexOutOfBoundsException {
+        int value = signedInt;
+        int result = 0;
+        for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
+            final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
+            result |= contiguousBitRange.assembleUncheckedSignedInt(value);
+            value >>= contiguousBitRange.width();
+        }
+        return result;
+    }
+
+    @Override
+    public int assembleUncheckedUnsignedInt(int unsignedInt) throws IndexOutOfBoundsException {
+        int value = unsignedInt;
+        int result = 0;
+        for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
+            final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
+            result |= contiguousBitRange.assembleUncheckedUnsignedInt(value);
+            value >>>= contiguousBitRange.width();
+        }
+        return result;
+    }
+
+    @Override
+    public String encodingString(String value, boolean signed, boolean checked) {
+        final StringBuilder sb = new StringBuilder();
+        int shift = 0;
+        for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
+            final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
+            final String bits = (shift == 0) ? value : "(" + value + (signed ? " >> " : " >>> ") + shift + ")";
+            final String encoding = contiguousBitRange.encodingString(bits, signed, false);
+            if (encoding.length() != 0) {
+                if (sb.length() != 0) {
+                    sb.append(" | ");
+                }
+                sb.append(encoding);
+            }
+            shift += contiguousBitRange.width();
+        }
+        return sb.toString();
+    }
+}